The marketing manager of a large supermarket chain would like to determine the effect of shelf space (in feet) on the weekly sales of international food (in hundreds of dollars). A random sample of 12 equal sized stores is selected, with the following results:

Store	Shelf Space(X)	Weekly Sales(Y)
1	10	2.0
2	10	2.6
3	10	1.8
4	15	2.3
5	15	2.8
6	15	3.0
7	20	2.7
8	20	3.1
9	20	3.2
10	25	3.0
11	25	3.3
12	25	3.5

Find the equation of the regression line for these data. What is the value of the coefficient of determination?

The marketing manager of a large supermarket chain would like to determine the effect of shelf space (in feet) on the weekly sales of international food (in hundreds of dollars). A random sample of 12 equal sized stores is selected, with the following results:

Store	Shelf Space(X)	Weekly Sales(Y)
1	10	2.0
2	10	2.6
3	10	1.8
4	15	2.3
5	15	2.8
6	15	3.0
7	20	2.7
8	20	3.1
9	20	3.2
10	25	3.0
11	25	3.3
12	25	3.5

Find the equation of the regression line for these data. What is the value of the coefficient of determination?